12665357 has 8 divisors (see below), whose sum is σ = 13664376. Its totient is φ = 11694592.

The previous prime is 12665311. The next prime is 12665363. The reversal of 12665357 is 75356621.

It can be written as a sum of positive squares in 4 ways, for example, as 1503076 + 11162281 = 1226^2 + 3341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12665357 - 2⁶ = 12665293 is a prime.

It is a super-2 number, since 2×12665357² = 320822535874898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6128 + ... + 7929.

It is an arithmetic number, because the mean of its divisors is an integer number (1708047).

Almost surely, 2^12665357 is an apocalyptic number.

12665357 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12665357 is a deficient number, since it is larger than the sum of its proper divisors (999019).

12665357 is a wasteful number, since it uses less digits than its factorization.

12665357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14127.

The product of its digits is 37800, while the sum is 35.

The square root of 12665357 is about 3558.8420869715. The cubic root of 12665357 is about 233.0983209724.

The spelling of 12665357 in words is "twelve million, six hundred sixty-five thousand, three hundred fifty-seven".